Internal combustion engine



April 25, 1933. J. scl-ucK 1,905,754

INTERNAL comsusnou ENGINE Filed July 25, 1929 52 59 a /0 5.5 V5 [/6 s9." 60 a, m

4 J l7z/ 22 INV NT R M ATTOQZEY Patented Apr. 25, 1933 UNITE stars 'P TI E v J 'ACOB SCI-IICK, OF SOUND BEACH, CONNECTICUT, ASSIGNOR TO SGHICKDRY SHAVER,

. .INC ACORPORATIOLT OF DELAWARE INTERNAL COMBUSTION nnemn Applicationfiled m 2'5,

This invention relates to an improvedin-' ternal combustion engine ofthe type that employs two cylinders operating side by side to operate acrank shaft at the same time. The construction allows 'ready'cooling byits increased area. r

The object of the invention is to provide a simple construction by whichthe control of intake and exhaust ports is easy and efficient, by whichasingle sleeve in each cylinder is moved to control the inlet or outletof either fuel or burnt gas, to simplify the connecting means betweenthe piston and the shaft, to provide a simple and eflicient means foroperating said sleeves from the shaft and to provide certain details ofconstruction which will be hereinafter more fully described and finallyembodied in the claims.

The invention is illustrated in the accompanying drawing in which Figure1 is a section through two cylinders of an engine embodying myinvention. Figure 2 is a sec tion of a modified form of the invention.

The engine comprises a series of cylinders arranged in pairs and thisarrangement can be as desired but is preferably radial. In Figure 1, Ishow two of such cylinders at 10 and 11. These cylinders are usuallysecured in borings in the cylinder block 10. The cylinders have acylinder head 12 which is common to both cylinders, is usually ar rangedat a distance from the inside connecting piece of the cylinders. Inother words it bridges both cylinders and in conjunction with them formsa single combustion chamber. -The said chamber is shown at 13. Thecylinder head carries the spark plug 1 1 to ignite the fuel compressedin the combustion chamber.

In each cylinder is a piston, the piston 15 reciprocating in cylinder 10and the piston 16 in cylinder 11. The pistons move together to rotatethe shaft 17. The pistons are shown as connected by a piston pin 18which slides 1929. Seria1'No.380,849.

in. the slots 19 in the cylinder structure. The connecting rod 20connects the pin "18 with the crank 21 of the shaft 17. The shaft 17rotates inbearings 22 which ar'e'formed on'the cylinder block 10. i

The cylinders are each provided with a single sleeve for*controlling'the intake of fuel and the exhaust of the burnt gases." Inthe drawing the. intake cylinder 10 is provided with a sleeve 23. i Thesleeve 23 has a port 24 which can be placed in register with the port 25of the cylinder and which is connected by the inlet pipe 26 withtheinlet manifold 27 This inlet manifold is prefer ably made annular toconveniently supply the radially arranged sets of cylinders.

The exhaust cylinder 11 is provided with a sleeve-28which has a port 29which can be placedin register with theexhaust port 30 ofthe cylinder'll. This-exhaust port opens to the atmosphere. T The cylinder 11has its main exhaust port 31* connected to a manifold "ormufller 32.:This main'exhaust' is uncoveredby the piston16 when'the piston is attheend of its expansion stroke. The sleeve 28 has a port 33 which uncoverstheport 31 when the pis ton uncovers it butcloses it when the piston;

is. on its suction stroke. 1

' 'Eachsleeve is operated through a cam, the

sleeve'23. by the cam3et and the piston 28 by-the cam 35. The cams haveslots that'actuate rollers at the bottom of the sleeves. The camsoperate at half the speed of the shaftl'? and the means'shown foraccomplishing'this comprise the spur gear 37,'the small pinions 38,secured on the bearings-22, and the internal gear 39. The gear 37 isfastened to the shaft 17 and the gear 37 is'r otatable on the shaft 17.The gears 39 are preferably made in the same piece or secured to thecams 3e and 35 which operate the roll-:

ers 36 and'the studs 40 to move'the sleeve longitudinally in theirrespective cylinders.

extended to form a sleeve 41 which carries the propeller support: 42.Anti-friction bearings can be employed where thought desirable to reducethe friction of the parts.

In the operation of this engine the port 25 is opened by the port 24: onthe intake or suction stroke and closed on the compression stroke. Atthe completion of the compression stroke the spark plug 14 ignites thefuel mixture, and both pistons are propelled simultaneously to rotatethe shaft 17 by the connecting rod 20. pansion stroke the main exhaustport 31 is opened by the piston 16 and sleeve port 33 and the major partof the heat-and'the noise are released into the muflleror manifold 32.On the exhaust stroke of the pistons the scavenging of the cylinders iscompletedby the opening of the exhaust port 30 .by the port 29. This isdone with practically no back pressure as most of the gases have beenpreviously released through port 31?. Then, the pistons again start ontheir intake stroke with port 230 closed and'tlie port 25 open.

The cylinder head and both cylinders form a single combustion chamberand remain open to each other asthe sleeves are cut down or inclined asat 46 in order to keep the minor sides of the sleeves from riding abovethe top of the wall 47 which separates the cylinders.

The use of two smaller cylinders instead of a large single'eylinderallows a readydi'ssipation of heatthrough the fins 48 placed around thecylinders preferably on the sleeves 49. The compression-can be broughtto a high ratio and the propagation of the flame after ignition iscompleted quickly. The heat is released at a point removedfrom thecombustion-chamber and is therefore not concentrated at the top of thecylinders.-

In Figure 2 Ishow a modified form of engine in which the cylinders 10and 11 are supplied with poppet valves in :lieu of the sleeves. .Thevalve 50 is the inlet valve and is operated by the valve mechanism 51operated by push rod 52 and the cam 53. .The cam .53 is on the camshaft- 54 operated at half the speed of theshaft 1 7 by the gears 5 5and56. The exhaust valve is shown at '57 and is actuated by the valvemechanism 58, Elie rod 59 and the cam 60 on the camshaft The valvesareplaced in the cylinderheads and give adequate space for a promptcharging of the cylinders anda-free and extensive exhaust of the burntgases.

In this engine I have overcome the difli culties caused by theoverheating of valves and the delay in clearing the cylinder of burntgases. The L-head and T-head are,

ra-ngement of valves have been supplanted by overhead valves. Afterthese have prov-iv en insuificient the larger valve area. desiredhasbeen aided bydual valves in the-head At the end of the ex and in somecases to the extent of triple exhaust valves. This of course multipllesparts such as rods and cams and springs and these in turn are potentialcauses of engine failure in airplanes.

I have supplied either a single sleeve in the cylinder or a large valvein the head of the cylinder and a main exhaust uncovered by the pistonat the end of the stroke. The exhaust is thus complete and withoutconcentration of heat.

I claim:

An internal combustion engine comprising a pair'of cylinders side byside with a partition between them which partition *terminates short ofthe end of the cylinders, a

single fiat cylinder head bridging both cylinders and co-operating withthe end of the partition to form-a combustion chamber, pistons in thecylinders, and sleeves in the cylinders and surrounding the pistons, thecylinders-having ports controlled by the sleeves, said sleeves ihavinginclined ends whereby the-sleeves at the outer sides areat the end ofthe cylinder and .attheir inner sides at the top of the partition.

Intestimony whereof I aflix my signature.

JACOB SCHICK.

